Made by Veloci Cycle, the ROLLCii lockring is machined from hardened cro-mo steel, has a black phosphate finish and installs using a Shimano/Sram 16-notch outboard bearing bottom bracket tool (like the Park BBT-9).

For use with cogs 13t and larger.

Not compatible with Campagnolo, Miche, Phil Wood, Mack or Mavic hubs.